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Commit 69e50479 authored by Lee Jones's avatar Lee Jones Committed by Bjorn Andersson
Browse files

remoteproc: debugfs: Add ability to boot remote processor using debugfs 



This functionality is especially useful during the testing phase.  When
used in conjunction with Mailbox's Test Framework we can trivially conduct
end-to-end testing i.e. boot co-processor, send and receive messages to
the co-processor, then shut it down again (repeat as required).

Signed-off-by: default avatarLudovic Barre <ludovic.barre@st.com>
Signed-off-by: default avatarLee Jones <lee.jones@linaro.org>
Signed-off-by: default avatarBjorn Andersson <bjorn.andersson@linaro.org>
parent 6cb0e0f6

drivers/remoteproc/remoteproc_debugfs.c

+34 −0
Original line number Diff line number Diff line
@@ -88,8 +88,42 @@ static ssize_t rproc_state_read(struct file *filp, char __user *userbuf, 
	return simple_read_from_buffer(userbuf, count, ppos, buf, i);

}



static ssize_t rproc_state_write(struct file *filp, const char __user *userbuf,

				 size_t count, loff_t *ppos)

{

	struct rproc *rproc = filp->private_data;

	char buf[10];

	int ret;



	if (count > sizeof(buf) || count <= 0)

		return -EINVAL;



	ret = copy_from_user(buf, userbuf, count);

	if (ret)

		return -EFAULT;



	if (buf[count - 1] == '\n')

		buf[count - 1] = '\0';



	if (!strncmp(buf, "start", count)) {

		ret = rproc_boot(rproc);

		if (ret) {

			dev_err(&rproc->dev, "Boot failed: %d\n", ret);

			return ret;

		}

	} else if (!strncmp(buf, "stop", count)) {

		rproc_shutdown(rproc);

	} else {

		dev_err(&rproc->dev, "Unrecognised option: %s\n", buf);

		return -EINVAL;

	}



	return count;

}



static const struct file_operations rproc_state_ops = {

	.read = rproc_state_read,

	.write = rproc_state_write,

	.open = simple_open,

	.llseek	= generic_file_llseek,

};